The photoelectric conversion efficiency of single crystal silicon solar energy is up to 24%, which is the highest in all kinds of solar cells. But the production cost of single crystal silicon solar cells is very large, so that it can't be widely used and widely used. Polycrystalline silicon solar cells from the cost of making speaking, than monocrystalline silicon solar energy cell to cheaper, but polycrystalline silicon solar battery photoelectric conversion efficiency is to reduce a lot. In addition, polycrystalline silicon solar battery life to shorter than monocrystalline silicon solar cell. Therefore, from the performance price ratio is concerned, the single crystal silicon solar cell is also slightly better.